Weight calculation refers to the process of determining the heaviness of an object, typically measured in units like grams, kilograms, or pounds. This can be done using various tools, such as a scale or a balance, which compare the object's mass against a known weight. To calculate weight, one can use the formula: Weight = Mass × Gravity. Here, mass is the amount of matter in the object, and gravity is the force exerted by the Earth, approximately 9.81 m/s². This formula helps in understanding how weight varies depending on the gravitational pull in different locations, such as on the Moon or Mars.